Seamless-tube-rolling machine.



No. 65|.7l4. Patented June 12, 1900. I E. |vms & w. GRIFFITHS.

SEAMLESS TUBE ROLLING MACHINE.

[Avplication filed Feb 10, 1900. (No Model.) 2 sheets sheot I.

No. 65l,7|4. Patented lune l2, I900.

IE. IVINS & w. smrrnns. SEAMLESS'T'UBE BOLILINGMACHINE.

(Application filed Feb. 10,- 1900.) (No Model.) 2 Sheats-$heet 2.

7 fivenfora' w/ mz $519 6: M

" ITE STATES PATENT OFFI ELLWOOD IVINS AND WILLIAM GRIFFITHS, OF PHILADELPHIA, PENNSYL- VANIA; SAID GRIFFITHS ASSIGNOR, BY DIRECT AND MESNE ASSIGN- MENTS, OF THREE-FOURTHS TO SAID IVINS AND GEORGE I. COOK, OF

NEW YORK, N. Y. l

SEAIVVIVL'HESS-ITU BE-ROL Ll Ne MACH-IN E.

SPECIFICATION forming part of Letters Patent No. 651,714, dated. June 12,1900. Application filed February 10, 1900. Serial No.4,738. (No model.)

To aZZ whom it mcty ooncern:

Be it known that we, ELLWOOD IVINS and WILLIAM GRIFFITHS, citizens of the United States, residing at Philadelphia, in the county of Philadelphia, State of;Pennsylvania, have invented new and useful Improvements in the Manufacture of Seamless Tubes, of which the following is a specification. 1

Our invention relates toapparatus for form IO ing tubes from ingots, blanks, or billets of steel or other nietal wherein are employed drawing and compressing rolls and a central piercing-mandrel, the ingots, blanks, or billets being passed endwise between the adja- I 5 cent workingfaces of said rolls and being pierced centrally and operated on interiorly by said mandrel, and has for one object to combine with said drawing andcompressing rolls and mandrel a supplemental mandrel and a series of supplemental rolls for further treating the tubesatone operation to remove the spiral convolutions formed therein by the piercing operation and at the same time, if desired, to reduce the thickness of 2 5 the walls of said tubes, said supplemental rolls being preferably the same in configuration and relative arrangement as the drawing and compressing rolls.

Still another object of our present inven- 0 tion is to provide improved means for cooling the conical point of thepiercing-maudrel, which we accomplish by forming the same and its supporting-shaft. hollow and passing therethrough a stream of cooling liq- 5 uid, preferably water, novel means being employed for supplying the cooling liquid without interfering with the passage of the tubes over the mandrel..

In the accompanying drawings, Figure 1 is a side elevation of our improved rolls and piercing-mandrel. Fig. 2 is a top. plan view of the same. Fig. 3 is a vertical sectional View taken on the line w 00, Fig. 1. Fig. 4 is a top plan view showing the piercing-man- 5 drel and rolls and also the supplemental mandrel and rolls arranged to the ,rear thereof. Fig. 5 is an enlarged detail sectional view of the piercing-mandrel and its shaft, showing the means for cooling the point of said mandrel. Fig. 6 is a similar and still more en larged view, at a right angle to Fig. 5, of the rear end of the interior liquid-supply tube for said mandrel and its connected liquidsupply pipe.

Similar numerals of reference denote corresponding parts in the several views.

In the said. drawings, referring more particularly to Figs. 1, 2, and 3, the referencenumerals 1, 2, and 3 denote the three barrel-shaped rolls, the same being mounted on the shafts 4, 5, and 6, respectively, and adapt- .ed to rotate in unison in the direction of the arrows. It will be observed by reference to Fig. l that the shaft 4 of roll 1 lies in a horizont-al plane, while the shafts 5 and 6 of rolls 2 and 3 areinclined at opposite angles to the horizontal, the angle of shaft 5 being upward-from left to right, while that of shaft 6 is downward in the same direction. By referring to Fig. 2, however, it will be ob served that none of said shafts lies in a vertical plane parallel with the piercing-mandrel 7, which is located at the point of intersection of said rolls, as shown, the shaft 4 of roll 1 inclining to one side of said plane, while the shafts 5 and 6 of rolls 2 and 3 incline to the opposite side, although lying parallel with each other. i In Fig. 4 we have illustrated in connection with the piercing-mandrel 7 and its rolls 1, 2,

and3 the mechanism for removingtbe spiral .convolutions and, if desired, for reducin'g thewalls of the tubes, the same consistingof a series of supplemental rolls 8, 9, and 10, corresponding in configuration and relative arrangement to and rotating at the same speed with rolls 1, 2, and 3, and operating on the tubes formed by mandrel 7 and rolls 1, 2, and 3, a supplemental mandrel 11 being mounted on the shaft 12, carrying mandrel 7-, 'and being located at the point of intersection of said supplemental rolls to provide thence essaryinternal resistance for the tubes. Said supplemental mandrel is of an even diame-.

' ter throughout its working surface corra sponding to the greatest diameter of the conthe conical mandrel 7 will be readily under ical piercing-mandrel 7, its front end being slightly beveled at 13 to permit the read y passage of the tubes thereon.

In Figs. 5 and 6 is shown the internal construction of the piercing-mandrel 7 and its shaft 12 for cooling the former, said shaft and IIiandrelbeing formed hollow and havingim. Serted therein atube 14, extending thelength' of said shaft 12 and terminating within the hollow interior of mandrel 7. 'At its rear pro jecting end said tube is formed with a conical seat to receive the angular extension of a liquid-supply pipe 16,'s aid parts being detachably retained together by a metallic strap 17, pivoted at 18 to pipe 14 andadapt= ed to embrace the outer inclined end of extension 15 with a wedg'ing action to firmly retain the parts together, as will be readily comprehended, it being understood that supply-pipe 16 may be formed of flexible material or may be rigid and have a hinged colinectionwith its supply source (not shown)to permit its being swung down out of the path oftravel of the tubes as they pass over the rear end of shaft 12, the strap 17 having been previously disengaged from extension'15.

From the above description the operation of the device will be understood to be as follows: The billets to be treated are successively fed between rolls 1, 2; and-3, by which they are rotated and fed against the pointof mandrel 7, where the combined act-ion of said mandreland rolls effects the piercing of the gether, thereby reducing the pass between them and mandrel 11, which necessarily effects a corresponding reduction in the external diameters of the tubes without affecting their internal diameters.

mTheoperation of the cooling device for stood, the cooling liquid, preferably water, being supplied from a suitable reservoir through pipe 16, extension 15, and pipe 14 and preferably under considerable pressure, the same impinging against the front end of the chamber formed in the mandrel 7, thereby exerting a cooling effect thereon and escaping backward through the shaft 12 and around pipe1'4.

seating said extension against the rear end 1 It will be apparent, however, that unless pipes 14 and 16 can be dis of pipe 14, but when swung upward sufiiciently to clear said extension permitting the latter and its pipe 16 to be swung downward or otherwise removed from pipe 14 to permit the passage of a completed tube over the end of shaft 12.

It will be understood that .ourimproved Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. In apparatusfor transforming blanks of metal into tubes, a series of feeding and compression rolls, and a conical piercing-mandrel located between the working faces thereof, in combination with a supplemental mandrel of even diameteiga'nd a series of supplemental feeding and compression rolls operating in conjunction with said supplemental mandrel to engage and act on the tubes after they pass from'said piercing-mandrel.- I

2. In apparatus for transforming blanks of metal into tubes, a series of rolls arranged so that no two of their axes lie in the same horizontal plane, said axes being also out of par- 1 allel alinement vertically with respect to the line of travel of the blank, and a conicalpiercing-mandrel located centrally with respect to the adjacent working faces of said rolls, in

' combination with a supplemental mandrel of even diameter, and a series of supplemental rolls con forming in configuration andarrangement with said first-mentioned rolls and operating in conjunction with said supplemental mandrel to receive and act on the tubes after they pass from said piercing-mandrel.

3. In apparatus fortransformfing blanks of metal into tubes, a series of barrel-shaped rolls arranged so that no two of their axes lie in the same horizontal plane, said axes being also out of parallel alinement vertically with respect to the line of travel of the blank, and a conical piercing-mandrel located centrally with respect tothe adjacent working faces of said rolls, in combination with asupplemental mandrel of even diameter, and a series of supplemental rolls conforming in configuracommunicate with said chamber, of a liquidsupply tube located within said shaft and of smaller external diameter than the diameter of said aperture in said shaft and open at its inner end, a removable liquid-supply pipe, and means for detachably engaging said pipe with the outer projecting end of said tube.

5. The combination'with a piercing-mandrel formed with an interior chamber, and its supporting-shaft longitudinally apertured to communicate with said chamber, of a liquidsupply tube located within said shaft and of smaller external diameter than the diameter said extension to detachably retain the two together.

In testimony whereof we have hereunto set our hands in the presence of two subscribing 15 witnesses.

ELLWOOD IVlNS. WILLIAM GRIFFITHS.

- \Vitnesses:

GEo. W. REED, THOS. S. REED. 

